McCarthy Gymnasium was a 3,000-seat multi-purpose arena located on the Mississippi State University campus. It opened in 1950 directly east of the "Tin Gym", MSU's previous on-campus arena that had opened in 1929. It was originally known as the Mississippi State Gymnasium, or the New Gym for short. When it opened, the facility held over 5,000 people. It was renamed for former MSU men's basketball coach James H. "Babe" McCarthy after his death in 1975. The facility had a seating capacity of 5,000 when it first opened in 1950, but capacity was reduced to the current 3,000 when retractable seating was removed. It was home to the Mississippi State University Bulldogs basketball teams until the Humphrey Coliseum opened in 1975 and was home to the MSU Tennis teams from 1999 until 2023.